Column-clamp.



PATENTED JULY 21, 1908. R. J. & T. W. BATT & W. BRANSOOMBE.

COLUMN GLAMP. APILIUATION IILED JULY 10, 1907.

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jazz? UNITED STATES PATENT OFFICE.

ROBERT JAMES BATT, THOMAS WORTH BATT, AND WALTER BRANSCOMBE, OF TORONTO JUNCTION, ONTARIO, CANADA.

COLUMN-CLAMP.

Specification of Letters Patent.

Patented July 21, 1908.

Application filed. July 10, 1907. Serial No. 383,129.

To all whom it may concern:

Be it known that we, ROBERT J AMES BATT, contractor, THOMAS WORTH BATT, contractor, and WALTER BRANSCOMBE, woodworking machinist, of the town of Toronto J unction, in the county of York, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Column-Clamps, of which the following is the specification.

Our invention relates to improvements in column clamps, and the object of the invention is to devise a cheap and durable form of clamp, whereby hollow columns when made in several pieces may be when glued together securely held in the glued position and it consists essentially of a chain having one end formed with an elongated link and a jaw plate connected to it at one end, and an elongated link with a right angular bend straddling the aforesaid link, and a wedge pin with a bend at the end extending between the right angular bend through the link connected to the jaw plate at the end remote from the plate, the opposite end of the chain being held in the jaw of the plate and the parts being arranged to clamp the column as hereinafter more particularly explained.

Figure 1, is a perspective view of portion of a column showing the application of our column clamp. Fig. 2, is an enlarged perspective detail of the tightening portion of the clamp.

In the drawings like letters of reference indicate corresponding parts in each figure.

A is the chain of our column clamp, which is at the one end of the ordinary form. At the opposite end, however, it is provided with an elongated link A having a jaw plate A connected to one end of the same and provided with a right angular j aw A A is a link provided with a right angular bend, which straddles the link A at the end remote from the jaw plate A A is the wedge pin provided with a right angular bend A, whereby it is held from coming out of the link A and serves always to keep the links A and A together.

The chain A is placed on the log as inclicated in Fig. 1, and is drawn as tightly as possible, the one ordinary end of the chain being passed into the jaw A The column may be of many sides, which it may be desired to turn in a lathe afterwards, such sides being glued together and formed substantially as shown.

In placing the column clamp in position we encircle the column with the chain placing one of the links in the aw plate when it is as tight as possible. It is preferable to place the wedge pin A immediately over one of the joints. We then by a hammer or other suitable device drive the wedge pin as much as possible, so that the chain and sections of the column are close and tight and in this position the chain will remain, being held by the wedge pin until the glue is thoroughly set and dry and the column finished.

It will of course be understood that we employ several of these column clamps throughout the length of the column.

From this description it will be seen that we provide -a very simple device in which the different sections of the columns may be clamped together very quickly and thereby save time in so doing.

One great advantage in our invention is that the pressure on the column is equally distributed throughout the circumference thereof, and not as in other forms where the clamp is used and where the pressure is di rected to one or two of the sections which has a tendency to collapse the columns. Another great advantage is that by the use of our clamp a lumber of less thickness can be used.

. What we claim as our invention is.

A column clamp comprising a chain having one end provided with a jaw plate or grab hook, the jaws of which are substantially at right angles to the major portion of the plate and are adapted to grasp the other end of the chain, an elongated link connected to the inner end of the j aw plate, an elongated link having a right angular bend designed to straddle the aforesaid elongated link and a wedge pin adapted to pass into the end of the elongated link adjacent to that link having the right angular bend and between the right angular bend and the end of the link, whereby a direct pull or strain is exerted on the chain coincident with its position on the column as specified.

ROBERT JAMES BATT.

THOMAS WORTH BATT. WALTER BRANSOOMBE. 

